As compared to anaerobic respiration, the energy gained during aerobic respiration is

Options

A. 8 times
B. 19 times
C. 12 times
D. 36 times

Answer

To solve the question regarding the comparison of energy gained during aerobic respiration versus anaerobic respiration, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Definitions**:
- **Aerobic Respiration**: This type of respiration requires oxygen and occurs in the presence of it. It produces a significant amount of energy.
- **Anaerobic Respiration**: This type of respiration occurs in the absence of oxygen and produces less energy compared to aerobic respiration.

2. **Identify the Energy Yield**:
- In **aerobic respiration**, the total energy yield is **38 ATP molecules per glucose molecule**.
- In **anaerobic respiration**, the total energy yield is only **2 ATP molecules per glucose molecule**.

3. **Calculate the Ratio of Energy Yield**:
- To find out how many times more energy is produced in aerobic respiration compared to anaerobic respiration, we can set up the following ratio:
\[ \text{Energy gained in aerobic respiration} : \text{Energy gained in anaerobic respiration} = 38 \text{ ATP} : 2 \text{ ATP} \]

4. **Simplify the Ratio**:
- Dividing both sides of the ratio by 2 gives us:
\[ \frac{38}{2} = 19 \]
- This means that aerobic respiration produces **19 times more energy** than anaerobic respiration.

5. **Conclusion**:
- Therefore, the answer to the question is that the energy gained during aerobic respiration is **19 times** that of anaerobic respiration.

### Final Answer:
The energy gained during aerobic respiration is **19 times** that of anaerobic respiration.

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